Elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elasticized elastic

Abstract

An automatic adjustment elastic ratio's rubber band is pressed to the pull cylinder of the folded fabric with double clear line on the upper end, relate to the field of home textile. The outlet end of the rubber band channel is butted with the inlet end of the rubber band stretching channel, the upper end surface of the fabric folded edge width control groove is connected and fixed with the lower end surface of the rubber band channel, the rubber band channel is fixedly connected with one side of the sliding connecting rod; the other side of the sliding connecting rod is connected with one end of the base connecting rotary shaft rod through the adjusting screw, the other end of the base connecting rotary shaft rod is connected with the pull cylinder base movable sleeve through the fixed knob screw, the pull cylinder base is installed on the sewing equipment table top; the resistance plate is arranged in the rubber band stretching channel, the resistance plate is connected with the inlet end of the rubber band channel, the rubber band stretching channel upper end rubber band tightness adjusting screw, the rubber band channel and the rubber band stretching channel bottom surface are flush, the left and right ends are aligned; the rubber band channel lower end fabric folded edge width control groove extends left by 0.3cm. The utility model can guarantee that the fabric sewing head size is consistent, makes the flat rubber band evenly distribute around the bed cover, realizes continuous production.

Description

Technical Field

[0001] This utility model relates to the field of home textile production technology, specifically a printed elastic band with an automatically adjustable elastic ratio for home textiles, with double visible stitches pressing down on the upper end of the fabric folding tube. Background Technology

[0002] Currently, in the sewing process of elastic-stitched fitted sheet bottoms in home textile products, the conventional method is to use three stitches around the bottom edge of the fitted sheet. The operator manually stretches the elastic band and overlaps it by 1cm from the edge before pressing the first topstitch, which is 0.1cm from the top edge of the elastic band. Then, a second topstitch is pressed 0.6cm from the first topstitch. The size of the seam allowance and the elasticity ratio of the elastic band are controlled by the operator's experience.

[0003] In actual production, the above method uses ordinary sewing machines, which has many drawbacks. The size of the overlap seam allowance relies on the operator's experience, resulting in inconsistent seam allowance sizes on the fabric. This directly affects the appearance of the finished product and can even affect the fabric height, leading to substandard home textile products. Furthermore, the elasticity ratio of the elastic band is achieved through manual stretching, resulting in inconsistent elasticity ratios in the sewn products. Elastic bands that are stretched to the surface will have a large crease after unwinding, while those that are not stretched enough will have a loose crease after unwinding. Additionally, the stitches are not straight, and the distance between the two lines is inconsistent, leading to a poor appearance of the finished product. Therefore, products made by hand are of poor quality, unable to meet customer quality requirements, and are too time-consuming and labor-intensive, affecting work efficiency and making them unsuitable for mass production. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, the purpose of this invention is to provide an elastic band with an automatically adjustable elastic ratio that uses double visible stitching at the top to press down on the folded fabric pull tube, so as to solve the problems of inconsistent elastic ratio of the elastic band, inconsistent seam size of the overlapping fabric, and inability to complete two sewing lines at once.

[0005] To achieve the aforementioned objectives, this invention provides an automatic elastic band adjustment mechanism for a fabric folding cylinder, which uses double visible stitching at the upper end to press down on the fabric. The mechanism includes an elastic band stretching channel, an elastic band channel, a fabric hem width control groove, a sliding connecting rod, a base connecting rotating shaft, and a cylinder base. The outlet end of the elastic band channel is connected to the inlet end of the elastic band stretching channel. The upper end face of the fabric hem width control groove is connected and fixed to the lower end face of the elastic band channel. The elastic band channel is fixedly connected to one side of the sliding connecting rod. The other side of the sliding connecting rod is connected to one end of the base connecting rotating shaft via an adjusting screw. The other end of the base connecting rotating shaft is movably connected to the cylinder base via a fixing knob screw. The cylinder base is installed via a fixing screw. On the sewing machine table; a resistance plate is provided in the elastic band stretching channel. The elastic band tension adjustment screw at the upper end of the elastic band stretching channel adjusts the elastic ratio of the flat elastic band through the resistance plate. The bottom surface of the elastic band channel is flush with the bottom surface of the elastic band stretching channel, and the left and right ends are aligned. The elastic band channel extends to the left by L1 0.3 cm from the lower end of the fabric hem control groove. At L2 0.1 cm from the left side of the outlet end of the elastic band channel, it is aligned with the left needle of the double needle sewing machine. The left needle of the double needle sewing machine presses down on the single layer of fabric and ties the first topstitch on its left side. The right needle, with a distance L3 0.6 cm from the left needle, presses down the fabric hem and ties the second topstitch on it.

[0006] Furthermore, the fabric hem width control groove is a plate winding structure, consisting of a large baffle and a hem control groove, with a channel between the large baffle and the hem control groove to facilitate the fabric entering and hemming.

[0007] Furthermore, the elastic band channel is a flat cylindrical channel, and the inner width L4 of the elastic band channel is 2 cm to 2.5 cm.

[0008] Furthermore, the elastic band stretching channel is a flat cylindrical channel, and the resistance plate is a rectangular plate. One end of the resistance plate is bent upward and welded to the outer side of the top surface of the elastic band channel, while the other end of the elastic band channel extends outward along the elastic band stretching channel and presses against the bottom end of the elastic band tension adjustment screw. The length of the resistance plate is 0.1 cm longer than the outward extension L6 of the elastic band stretching channel, and the width is 0.1 cm shorter than the elastic band stretching channel L7. The elastic band tension adjustment screw is threadedly connected to the top surface of the elastic band stretching channel.

[0009] Furthermore, the pull tube base has a sliding groove, and one side of the pull tube base has an upwardly curved bent edge.

[0010] Furthermore, the elastic band with automatic elasticity ratio is pressed against the folded fabric tube at the upper end by double visible lines. The feature is that: a bending structure is provided at the connection side of the sliding connecting rod and the elastic band channel, and a stop rod is provided vertically on both sides of the other connecting rod. The connecting rod has a sliding groove, and the adjusting screw in the sliding groove locks the base connecting to the rotating shaft. The height of the bottom edge of the stop rod is lower than the height of the bottom edge of the bent edge of the tube base.

[0011] Furthermore, the elastic band with automatic elasticity adjustment ratio is pressed against the fabric folding tube at the upper end by double visible lines. The elastic band stretching channel, elastic band channel, fabric folding width control groove, sliding connecting rod, base connecting rotating shaft, tube base, and resistance plate are made of smooth, burr-free stainless steel.

[0012] Compared with existing technologies, this invention ensures consistent fabric hem width and guarantees that the topstitching on the elastic band is 0.1 cm from the edge. The first topstitching on the left presses down on the single layer of fabric, and the second topstitching on the right side, spaced 0.6 cm apart, presses down on the fabric hem 0.4 cm. Furthermore, the elasticity ratio of the elastic band meets the technical parameter requirements, ensuring that the elasticity of the flat elastic band is evenly distributed around the fitted sheet. This reduces the number of stops and enables continuous production. It is particularly suitable for home textile fitted sheet products where the elasticity ratio of the externally attached flat elastic band is critical. Compared to manual operation, production efficiency is significantly improved, product quality is stable, operation is convenient, and the application range is wide. Attached Figure Description

[0013] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 yes Figure 1 A front side view of the pull tube.

[0015] Figure 3 yes Figure 1 The rear side view of the pull tube.

[0016] In the diagram: 1. Elastic band stretching channel; 2. Elastic band tension adjustment screw; 3. Elastic band channel; 4. Fabric hem width control groove; 4-1. Large baffle; 4-2. Hem control groove; 4-3. Channel; 5. Sliding connecting rod; 5-1. Connecting side; 5-2. Connecting rod; 5-3. Stop rod; 6. Adjusting screw; 7. Base connecting rotating shaft; 8. Fixing knob screw; 9. Pull tube base; 9-1. Bending edge; 10. Fixing screw; 11. Resistance plate; 12. First visible stitch; 13. Second visible stitch; 14. Flat elastic band; 15. Fabric. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, the automatic elasticity adjustment elastic band of this utility model, with double visible lines pressing down on the upper end of the fabric folding cylinder, mainly includes an elastic band stretching channel 1, an elastic band channel 3, a fabric fold width control groove 4, a sliding connecting rod 5, a base connecting rotating shaft 7, and a cylinder base 9. The cylinder mainly consists of two parts: a fabric control device and an elastic band stretching device. The fabric control device is the fabric fold width control groove 4, which includes a large baffle 4-1, a fold control groove 4-2, and a channel 4-3. The elastic band stretching device mainly includes an elastic band stretching channel 1, an elastic band tension adjustment screw 2, an elastic band channel 3, and a resistance plate 11. The elastic band stretching channel 1, elastic band channel 3, fabric fold width control groove 4, sliding connecting rod 5, base connecting rotating shaft 7, cylinder base 9, and resistance plate 11 are made of smooth, burr-free stainless steel, effectively preventing scratches and damage to the product.

[0020] The outlet end of the elastic band channel 3 is connected to the inlet end of the elastic band stretching channel 1. The upper end face of the fabric hem width control groove 4 is connected and fixed to the lower end face of the elastic band channel 3. The elastic band channel 3 is fixedly connected to one side of the sliding connecting rod 5. The other side of the sliding connecting rod 5 is connected to one end of the base connecting rotating shaft 7 via the adjusting screw 6. The other end of the base connecting rotating shaft 7 is movably connected to the pull tube base 9 via the fixing knob screw 8. The pull tube base 9 is installed on the sewing equipment table via the fixing screw 10. The elastic band stretching channel 1 is provided with a resistance plate 11. The flat elastic band 14 passes through the elastic band at the upper end of the elastic band stretching channel 1. The tension adjustment screw 2 adjusts the elasticity ratio of the flat elastic band 14 through the resistance plate 11. The bottom surface of the elastic band channel 3 is flush with the bottom surface of the elastic band stretching channel 1, and the left and right ends are aligned. The elastic band channel 3 extends to the left by L1 0.3 cm from the lower end of the fabric hem control groove 4. The left end of the elastic band channel 3 is aligned with the left needle of the double needle sewing machine at L2 0.1 cm to the right. The left needle of the double needle sewing machine presses down on the single layer of fabric and ties the first visible thread 12 on its left side. The right needle, which is 0.6 cm away from the left needle by L3, presses down on the fabric hem and ties the second visible thread 13 on it.

[0021] Preferably, the fabric hem width control groove 4 is a plate winding structure, consisting of a large baffle 4-1 and a hem control groove 4-2. There is a channel 4-3 between the large baffle 4-1 and the hem control groove 4-2 to facilitate the entry and hem folding of the fabric. The hem width L5 of the fabric hem width control groove 4 is 1 cm.

[0022] Preferably, the elastic band channel 3 is a flat cylindrical channel, and the inner width L4 of the elastic band channel 3 is 2 cm to 2.5 cm. Usually, the elastic band is a 2 cm knitting machine flat elastic band. Therefore, the inner width of the elastic band channel 3 is 2 cm. It can also be adjusted according to product needs and the distance requirements of the double needle bar of the double needle machine.

[0023] Preferably, the elastic band stretching channel 1 is a flat cylindrical channel, and the resistance plate 11 is a rectangular plate. One end of the resistance plate 11 is bent upward and welded to the outer side of the top surface of the elastic band channel 3, while the other end of the elastic band channel 3 extends outward along the elastic band stretching channel 1 and presses against the bottom end of the elastic band tension adjusting screw 2. The length of the resistance plate 11 is 0.1 cm longer (L6) than the elastic band stretching channel 1, and the width is 0.1 cm shorter (L7) than the elastic band stretching channel 1. The elastic band tension adjusting screw 2 is threadedly connected to the top surface of the elastic band stretching channel 1. The elasticity ratio of the flat elastic band 14 can be adjusted via the elastic band tension adjusting screw 2 at the upper end of the elastic band stretching channel 1 and the resistance plate 11.

[0024] Preferably, the pull tube base 9 has a sliding groove, and one side of the pull tube base 9 has an upwardly curved bent edge 9-1; the connection side 5-1 between the sliding connecting rod 5 and the elastic band channel 3 has a bent structure to strengthen the pull tube; the other side of the connecting rod 5-2 has vertical stop rods 5-3 on both sides, and the connecting rod 5-2 has a sliding groove. The adjusting screw 6 in the sliding groove locks the base connecting rotating shaft 7. The height of the bottom edge of the stop rod 5-3 is lower than the height of the bottom edge of the bent edge 9-1 of the pull tube base 9, which allows the pull tube base 9 to control the stroke of the sliding connecting rod 5, stabilize the position of the sliding connecting rod 5 on the double needle sewing machine table, and effectively prevent the pull tube from shaking when the operator sews the product, thus affecting the sewing quality.

[0025] In use, combining the sewing positions of the double-needle sewing machine's needles with those of the product, connect the sliding connecting rod 5 to the base connecting rotating shaft 7 via the adjusting screw 6. Rotate the pull tube base 9 to bring it close to the sliding connecting rod 5, and then connect the pull tube base 9 to the table of the double-needle sewing machine via the fixing screw 10. Since both the pull tube base 9 and the sliding connecting rod 5 have sliding grooves, they can be adjusted freely according to sewing needs. After the sewing thread of the product is aligned with the position of the left needle of the double-needle sewing machine, tighten the adjusting screw 6 on the sliding connecting rod 5 and the fixing screw 10 on the pull tube base 9. In this way, the pull tube is firmly fixed to the double-needle sewing machine. Furthermore, since there is a fixing knob screw 8 between the pull tube base 9 and the base connecting rotating shaft 7, the base connecting rotating shaft 7 can rotate freely around the fixing knob screw 8. During sewing, the operator can rotate the pull tube to the position of the sewing machine needle, and after sewing, rotate the pull tube counterclockwise to the right to facilitate the operator to quickly make the next product.

[0026] When pressing the fabric with elastic bands, insert a 2 cm wide flat elastic band 14 through the inlet of the elastic band channel 3 and straighten it. The flat elastic band 14 passes through the elastic band channel 3 and the resistance plate 11 in the elastic band stretching channel 1, and is initially positioned by the needle of the double needle sewing machine. Then, rotate the elastic band tension adjusting screw 2 at the upper end of the elastic band stretching channel 1 to control the resistance plate 11 of the elastic band stretching channel 1 to squeeze the flat elastic band 14, thereby adjusting the elasticity ratio of the flat elastic band 14 to achieve a ratio of 1:2 to 2.2 times. After meeting the product process requirements, the flat elastic band 14 exits through the elastic band channel. After the outlet of 3 enters the elastic stretching channel 1, it is pulled out and placed on the fabric 15 with the hem folded as required; the fabric hem width control groove 4 on the lower left side of the elastic channel 3 controls the hem width of the lower layer fabric 15 to 1cm after folding it back. The hem width of the lower layer fabric 15 of the fitted sheet is adjusted and has an elastic ratio. The flat elastic 14 overlaps the single layer fabric by 0.3cm on the left side. Align the left needle of the double needle sewing machine with the left side of the flat elastic 14 by 0.1cm from the left side of the flat elastic 14. Start the double needle sewing machine and sew the two topstitches on the flat elastic 14 in one go.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A type of elastic band with an automatically adjustable elastic ratio, wherein the upper end is secured to the fabric by double visible stitching, characterized in that: The pull tube includes an elastic band stretching channel (1), an elastic band channel (3), a fabric hem width control groove (4), a sliding connecting rod (5), a base connecting rotating shaft (7), and a pull tube base (9). The outlet end of the elastic band channel (3) is connected to the inlet end of the elastic band stretching channel (1). The upper end face of the fabric hem width control groove (4) is connected and fixed to the lower end face of the elastic band channel (3). The elastic band channel (3) is fixedly connected to one side of the sliding connecting rod (5). The other side of the sliding connecting rod (5) is connected to one end of the base connecting rotating shaft (7) via an adjusting screw (6). The other end of the base connecting rotating shaft (7) is movably connected to the pull tube base (9) via a fixing knob screw (8). The pull tube base (9) is installed on the sewing equipment table via a fixing screw (10). The elastic band stretching channel (1) is equipped with a resistance plate (11). The elastic band (14) is adjusted by the elastic band tension adjustment screw (2) at the upper end of the elastic band stretching channel (1) and the resistance plate (11). The elastic band channel (3) is flush with the bottom surface of the elastic band stretching channel (1) and the left and right ends are aligned. The elastic band channel (3) extends to the left by L1 0.3 cm from the lower end of the fabric hem control groove (4). The left side of the outlet end of the elastic band channel (3) is 0.1 cm to the right by L2 and is in a straight line with the left needle of the double needle sewing machine. The left needle of the double needle sewing machine presses the single layer of fabric and ties the first visible thread on its left side. The right needle, which is 0.6 cm away from the left needle by L3, presses the fabric hem and ties the second visible thread on it.

2. The elastic band with automatically adjustable elastic ratio according to claim 1, wherein the upper end is pressed against the folding sleeve of the fabric by double visible stitching, characterized in that: The fabric hem width control groove (4) is a plate winding structure, consisting of a large baffle (4-1) and a hem control groove (4-2). There is a channel (4-3) between the large baffle (4-1) and the hem control groove (4-2) to facilitate the entry and hem folding of the fabric.

3. The elastic band with automatically adjustable elastic ratio according to claim 1 has double visible stitches pressing down on the upper end of the fabric pull tube, characterized in that: The elastic band channel (3) is a flat cylindrical channel, and the inner width L4 of the elastic band channel (3) is 2 cm to 2.5 cm.

4. The elastic band with automatically adjustable elastic ratio according to claim 1, wherein the upper end is pressed against the folding sleeve of the fabric by double visible stitching, characterized in that: The elastic band stretching channel (1) is a flat cylindrical channel, and the resistance plate (11) is a rectangular plate. One end of the resistance plate (11) is bent upward and welded to the outer side of the top surface of the elastic band channel (3). The other end of the elastic band channel (3) extends out along the elastic band stretching channel (1) and presses against the bottom end of the elastic band tension adjustment screw (2). The length of the resistance plate (11) is 0.1cm longer than the elastic band stretching channel (1) by L6, and the width is 0.1cm shorter than the elastic band stretching channel (1) by L7. The elastic band tension adjustment screw (2) is threadedly connected to the top surface of the elastic band stretching channel (1).

5. The elastic band with automatically adjustable elastic ratio according to claim 1, wherein the upper end is pressed against the folding sleeve of the fabric by double visible stitching, characterized in that: The pull tube base (9) has a sliding groove, and one side of the pull tube base (9) has an upwardly curved bent edge (9-1).

6. The elastic band with automatically adjustable elastic ratio according to claim 1, wherein the upper end is pressed against the folding sleeve of the fabric by double visible stitching, characterized in that: The sliding connecting rod (5) is provided with a bending structure at the connection side (5-1) of the elastic band channel (3). The other side of the connecting rod (5-2) is provided with a stop rod (5-3) on both sides. The connecting rod (5-2) has a sliding groove. The adjusting screw (6) in the sliding groove locks the base connecting rotating shaft (7). The height of the bottom edge of the stop rod (5-3) is lower than the height of the bottom edge of the bent edge (9-1) of the pull tube base (9).

7. The elastic band with automatically adjustable elastic ratio according to claim 1, wherein the upper end is pressed against the folding sleeve of the fabric by double visible stitching, characterized in that: The elastic band stretching channel (1), elastic band channel (3), fabric hem width control groove (4), sliding connecting rod (5), base connecting rotating shaft (7), pull tube base (9), and resistance plate (11) are made of smooth, burr-free stainless steel.

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